Fiberlogy is one of the more famous Polish manufacturers of filament.
REFILL is a spool-free cartridge compatible with masterspool reusable spool, which anyone can print by themselves, according to the free RichRap project available to everyone. This solution is greener and slightly cheaper than filaments offered on disposable reels. Fiberlogy is one of several companies in the world that has decided to add them to their offer.
The application is the same as for filaments on spools. The only difference is that the refill does not have a spool, which makes it environmentally friendly firstly, and secondly, the shipment is lighter and therefore cheaper.